Figure b-17. excessive cascading, B-25, Figure b-18. minimized cascading – AT&T DEFINITY 7200 series User Manual
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SYNCHRONIZATION OF DIGITAL FACILITIES
B-25
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B
A
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C
SECONDARY (BACKUP) FREQUENCY REFERENCE
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PRIMARY FREQUENCY REFERENCE
DIGITAL TRANSMISSION FACILITY
D
Figure B-17. Excessive Cascading
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C
SECONDARY (BACKUP) FREQUENCY REFERENCE
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PRIMARY FREQUENCY REFERENCE
DIGITAL TRANSMISSION FACILITY
D
Figure B-18. Minimized Cascading
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